文献类型：期刊文献

英文题名：Development of Robust Fluorinated SiO2/PVDF Composite Hollow Fiber Membrane for Bromine Resources Recovery from Brine via Membrane Distillation

作者：Jin, Zhiyu[1];Lin, Yuqing[1];Zhang, Yiren[1];Ying, Jiadi[1];Gitis, Vitaly[2];Yu, Jianguo[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Comprehens Utilizat Salt Lake R, Sch Resources & Environm Engn, Shanghai 200237, Peoples R China;[2]Ben Gurion Univ Negev, Fac Engn Sci, Energy Engn Program, IL-84105 Beer Sheva, Israel

年份：2022

卷号：3

期号：7

起止页码：1874

外文期刊名：ACS ES&T WATER

收录：WOS:【ESCI(收录号:WOS:000891605400001)】；

基金：? ACKNOWLEDGMENTS The research was supported by the National Key Research and Development Program of China (No. U20A20142) .

语种：英文

外文关键词：membrane distillation; surface silicification; inorganic; organic composite membrane; bromine extraction; real brine

摘要：In this study, a superhydrophobic composite hollow fiber membrane consisting of a fluorinated silicification layer (fSiO2) upon a poly(vinylidene fluoride) (PVDF) substrate was developed via in situ silicification integrated with surface hydrophobic modification for bromine resources recovery from brine via membrane distillation (MD). The re-entrant hierarchical structure was established via surface silicification, after which (1H,1H,2H,2H-heptadecafluorodecyl) silane was introduced to transfer the surface property to be hydrophobic by reducing the surface energy with long fluorinated chains. The resultant fSiO2/ PVDF composite membrane exhibited a superhydrophobic property with a water contact angle of 147 degrees, which effectively prevents wetting when conducting MD, and performed a high permeating flux of 0.62 kg center dot m-2 center dot h-1. In a long-term stability test of 10-day operation duration, the fSiO2/PVDF composite membrane remained decent, with flux declines of 1.8% and 38.3% when treated by the aqueous bromine solution and real brine, respectively. This work sheds insight into the fabrication of novel inorganic/organic composite membranes for bromine resource extraction from brine.